Clinical Outcomes of Posterior Endoscopic Discectomy for Central Disc Herniation and Posterior Endplate Lesions in the Lumbar Spine
The purpose of this study was to evaluate the results and the reliability of microendoscopic discectomy (MED) on the central protruded lumbar disc. From September 1998 to December 2001, we performed MED on 200 patients (mean age, 36.3 ± 15.1 years). Among these, 28 patients who present with central disc protrusion underwent disc extraction. Central disc herniation was seen in 17 patients (mean age, 29.8 ± 8.4 years). Posterior endplate lesions were found in 11 patients (mean age, 16.8 ± 5.6 years). Evaluation of the operative results used the Japanese Orthopaedic Association (JOA) scoring sytem. Twenty-seven of 28 patients underwent endoscopic surgery. The remaining patient was a case of open conversion in which the early version of the disposable endoscope was used. The METRx reusable endoscope posed no special problems. The average JOA score of patients with central disc herniation was 12.9 ± 0.9 preoperatively, which improved to 27.8 ± 0.9 postoperatively. The average operation time was 66.5 min per segment. The average JOA score of those with endplate lesions was 17.7 ± 1.8, which improved to 27.8 ± 1.8. The average operative time was 105.9min. There were no special interoperative complications to report.
Key wordsLumbar spine Posterior endoscopic surgery Central disc herniation Posterior endplate lesion MED system
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